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Titolo:
COLD HARDENING OF SPRING AND WINTER-WHEAT AND RAPE RESULTS IN DIFFERENTIAL-EFFECTS ON GROWTH, CARBON METABOLISM, AND CARBOHYDRATE CONTENT
Autore:
HURRY VM; STRAND A; TOBIAESON M; GARDESTROM P; OQUIST G;
Indirizzi:
AUSTRALIAN NATL UNIV,COOPERAT RES CTR PLANT SCI,GPO BOX 475 CANBERRA ACT 2601 AUSTRALIA UMEA UNIV,DEPT PLANT PHYSIOL S-90187 UMEA SWEDEN
Titolo Testata:
Plant physiology
fascicolo: 2, volume: 109, anno: 1995,
pagine: 697 - 706
SICI:
0032-0889(1995)109:2<697:CHOSAW>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
RIBULOSE-1,5-BISPHOSPHATE CARBOXYLASE-OXYGENASE; SUCROSE-PHOSPHATE SYNTHASE; TRANSGENIC TOBACCO PLANTS; YEAST-DERIVED INVERTASE; LOW-TEMPERATURE; SINK-REGULATION; SPINACH LEAVES; PHOTOSYNTHESIS; RYE; ACCUMULATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
V.M. Hurry et al., "COLD HARDENING OF SPRING AND WINTER-WHEAT AND RAPE RESULTS IN DIFFERENTIAL-EFFECTS ON GROWTH, CARBON METABOLISM, AND CARBOHYDRATE CONTENT", Plant physiology, 109(2), 1995, pp. 697-706

Abstract

The effect of long-term (months) exposure to low temperature (5 degrees C) on growth, photosynthesis, and carbon metabolism was studied in spring and winter cultivars of wheat (Triticum aestivum) and rape (Brassica napus). Cold-grown winter rape and winter wheat maintained higher net assimilation rates and higher in situ CO2 exchange rates than the respective cold-grown spring cultivars. In particular, the relative growth rate of spring rape declined over time at low temperature, and this was associated with a 92% loss in in situ CO2 exchange rates. Associated with the high photosynthetic rates of cold-grown winter cultivars was a P-fold increase per unit of protein in both stromal and cytosolic fructose-1,6-bisphosphatase activity and a 1.5- to 2-fold increase in sucrose-phosphate synthase activity. Neither spring cultivar increased enzyme activity on a per unit of protein basis. We suggest thatthe recovery of photosynthetic capacity at low temperature and the regulation of enzymatic activity represent acclimation in winter cultivars. This allows these overwintering herbaceous annuals to maximize theproduction of sugars with possible cryoprotective function and to accumulate sufficient carbohydrate storage reserves to support basal metabolism and regrowth in the spring.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 12:44:21